23722146 has 96 divisors (see below), whose sum is σ = 64296960. Its totient is φ = 6403536.

The previous prime is 23722129. The next prime is 23722151. The reversal of 23722146 is 64122732.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64455 + ... + 64821.

It is an arithmetic number, because the mean of its divisors is an integer number (669760).

Almost surely, 2^23722146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23722146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32148480).

23722146 is an abundant number, since it is smaller than the sum of its proper divisors (40574814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23722146 is a wasteful number, since it uses less digits than its factorization.

23722146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410 (or 398 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 23722146 is about 4870.5385739156. The cubic root of 23722146 is about 287.3324382138.

Adding to 23722146 its reverse (64122732), we get a palindrome (87844878).

The spelling of 23722146 in words is "twenty-three million, seven hundred twenty-two thousand, one hundred forty-six".